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目的探讨AIDS局灶脑炎MRI特征。方法回顾性分析21例经综合诊断为AIDS局灶脑炎病例,所有病例均行MRI平扫、钆对比增强及DWI成像。结果 AIDS局灶脑炎病灶95.23%多发,主要分布在基底节区及皮髓交界区;形态为环状或不规则状,少数为结节状。MRI平扫病灶实质区主要为等T1WI等T2WI信号,坏死区为稍长T1WI长T2WI信号,T2 Flair上为高信号;增强扫描明显强化,可呈环状、结节状、“靶征”样强化。DWI上病灶主要为高信号。结论 AIDS局灶性脑炎MRI平扫、钆对比剂增强、DWI成像特征明显;综合各种检查信息能为病灶定性诊断、区分各种成份及确定病程提供有力依据。
Objective To explore the MRI features of focal encephalitis in AIDS. Methods A retrospective analysis of 21 cases of AIDS-related encephalitis diagnosed cases, all cases underwent MRI scan, contrast enhanced gadolinium and DWI imaging. Results The lesions of focal encephalitis were 95.23%, mainly distributed in the basal ganglia and the spinal cord junctional area. The morphology was ring or irregular, and the few were nodules. The MRI plain lesions mainly consisted of T1WI and other T2WI signals. The necrotic area was slightly longer T1WI long T2WI signal and T2 Flair was high signal. The enhanced scan was obviously enhanced and showed a ring-like, nodular, "Like to strengthen. DWI lesions mainly high signal. Conclusion MRI scan of focal encephalitis and enhanced gadolinium contrast agent and DWI imaging are obvious. Combining various examination information can provide a powerful basis for the qualitative diagnosis, distinguishing various components and determining course of disease.